21396555

素因数分解:

$3^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{2297}}^1$

素因数の和:2337

約数の個数: 40

約数和(自身を含む): 40040352

約数和(自身を除く): 18643797

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 115, 135, 207, 345, 405, 621, 1035, 1863, 2297, 3105, 6891, 9315, 11485, 20673, 34455, 52831, 62019, 103365, 158493, 186057, 264155, 310095, 475479, 792465, 930285, 1426437, 2377395, 4279311, 7132185, 21396555]

約数ペア:

[(1, 21396555), (3, 7132185), (5, 4279311), (9, 2377395), (15, 1426437), (23, 930285), (27, 792465), (45, 475479), (69, 310095), (81, 264155), (115, 186057), (135, 158493), (207, 103365), (345, 62019), (405, 52831), (621, 34455), (1035, 20673), (1863, 11485), (2297, 9315), (3105, 6891)]